PIEZO FILTERS
MULTI-ELEMENT, ULTRA MINIATURE
G.D.T. FLAT TYPE
CFUMꢀY/CFWMꢀY455kHz
The CFUMꢀY/CFWMꢀY lines of ceramic filters are
miniaturized versions of the CFUSꢀY/CFWSꢀY lines.
These ultra-miniature versions consume approximately
40% less volume while still offering the same excellent
G.D.T. characteristics as the CFUSꢀY/CFWSꢀY lines.
This reduction in size makes these devices ideal for compact
communication applications such as mobile telephones.
(Also available in 450kHz version.)
SPECIFICATIONS
CFUMꢀY 455kHz
40dB
Bandwidth
(kHz) max.
Attenuation at
455 100kHz
(dB) min.
6dB Bandwidth
(kHz) min.
Insertion Loss
(dB) max.
Group Delay Time
sec. max. (kHz)
Input/Output
Impedance (Ohms)
Part Number
CFUM455BY
CFUM455CY
CFUM455DY
CFUM455EY
CFUM455FY
CFUM455GY
±±1
±±2.1
±±0
±7.1
±6.0
±4.1
±ꢀ1
±ꢀ0
±21
±20
±±7.1
±±1
2ꢀ
2ꢀ
2ꢀ
2ꢀ
2ꢀ
2ꢀ
1
6
7
8
9
±1ꢀ (411 ± ±0.0)
±1ꢀ (411 ± 8.0)
20ꢀ (411 ± 7.0)
20ꢀ (411 ± 1.0)
20ꢀ (411 ± 4.0)
20ꢀ (411 ± ꢀ.0)
±100
±100
±100
±100
2000
2000
±0
• CFUM411ꢀY is a miniaturized 4-element version of the conventional CFUS411ꢀY.
• Note: For safety purposes, connect the output of filters to the IF amplifier through a DC blocking capacitor. Avoid applying a direct current to the output of ceramic filters.
DIMENSIONS: mm
CIRCUIT
CHARACTERISTICS
200
180
0
6.5
CFUM
455E
CFUM
10
455B
20
R1
160
140
120
100
80
6.3
3.5
1
3
0.7 0.1
2
30
40
50
Rg
RF
Voltmeter
Connection
1.0 max.
R2
E2
E1
S.S.G.
0dBm
0.15 0.05
0.8
0.5 0.1
CFUM455B
60
0.7
4
2.41.8
60
40
70
80
R1+Rg=R2=1.5kꢁ
ꢀ
ꢁ
ꢁ
ꢀ
1=INPUT
2=OUTPUT
3,4=GROUND
6.5
4.3
1.0
90
20
0
ꢂ
ꢃ
CFUM455E
ꢃ
ꢂ
100
420
440
460
480 500
Sealing
Frequency (kHz)
SPECIFICATIONS
CFWMꢀY 455kHz
50dB
Bandwidth
(kHz) max.
Attenuation at
455 100kHz
(dB) min.
6dB Bandwidth
(kHz) min.
Insertion Loss
(dB) max.
Group Delay Time
sec. max. (kHz)
Input/Output
Impedance (Ohms)
Part Number
CFWM455BY
CFWM455CY
CFWM455DY
CFWM455EY
CFWM455FY
CFWM455GY
±±1
±±2.1
±±0
±7.1
±6.0
±4.1
±ꢀ1
±ꢀ0
±21
±20
±±7.1
±±1
ꢀ1
ꢀ1
ꢀ1
ꢀ1
ꢀ1
ꢀ1
6
7
8
9
±0
±ꢀ
ꢀ0ꢀ (411 ± ±0.0)
ꢀ0ꢀ (411 ± 8.0)
ꢀ0ꢀ (411 ± 7.0)
ꢀ0ꢀ (411 ± 1.0)
40ꢀ (411 ± 4.0)
40ꢀ (411 ± ꢀ.0)
±100
±100
±100
±100
2000
2000
• CFWM411ꢀY is a miniaturized 4-element version of the conventional CFWS411ꢀY.
• Note: For safety purposes, connect the output of filters to the IF amplifier through a DC blocking capacitor. Avoid applying a direct current to the output of ceramic filters.
DIMENSIONS: mm
CIRCUIT
CHARACTERISTICS
200
180
0
CFWM
455B
9.5
10
160
140
120
100
80
20 CFWM
R1
455E
6.3
3.5
0.7 0.1
2
1
30
4
3
5
RF
Voltmeter
Connection
Rg
40
50
60
0.15
0.05
R2
E2
E1
S.S.G.
0dBm
2.5
2.7
2.8
0.5 0.1
0.9
4.3
60
40
70
80
CFWM455B
CFWM455E
R1+Rg=R2=2.0kꢁ
ꢁ
ꢁ
ꢀ
ꢂ
ꢀ
ꢂ
6.5
ꢄ
ꢃ
ꢄ
ꢃ
1=INPUT
2=OUTPUT
3,4,5=GROUND
90
20
0
100
1.0
420
440
460
480 500
Sealing
0.7
Frequency (kHz)
CG01-J
435
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